PAL-1 photo thread: Show us your kits and setup!

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Hendrik-Jan Megens

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Oct 17, 2021, 8:25:11 AM10/17/21
to PAL 6502 computer
The obligatory thread for showing off your completed kits and setup for the PAL-1. Also a great place to share building stories or ideas to inspire others. 

I'll kick off with mine:

Inspired by an original KIM-1 that was attached to a piece of cheap plywood that is on display at the Homecomputer museum in The Netherlands, I decided to attach my PAL-1 to a piece of leftover floorboard - advantage: it doesn't warp! 

E_vQmxeXoAM7s8w_.jpeg
Below is a picture of my PAL-1 ROM card connected to the ROM emulator designed by Kris Sekula (Mygeekyhobby.com). 
E99lM7rXEAEUfsI_.jpeg

Cheers,
Hendrik-Jan

GN L

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Oct 18, 2021, 8:30:14 AM10/18/21
to Hendrik-Jan Megens, PAL 6502 computer
Today’s setup😊

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Best Regards,
Liu GN

Neil Andretti

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Oct 18, 2021, 8:48:40 AM10/18/21
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IMG_4445.jpg

My current setup. Everything mounted on a Plexiglas, the PAL-1 itself is covered with plexi.
Above the Motherboard you see the raspbery zero running piGFX, on the bottom of the motherboard you see the dTR Tape emulator.
(sadly this does not work  in combination with the tape interface).


Nils

John Kennedy

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Oct 22, 2021, 2:08:35 PM10/22/21
to PAL 6502 computer
I used my PAL-1 to help test a 6502 emulator I wrote - details here: https://github.com/GrantMeStrength/KIM1

I made a case out of acrylic and 3D printed some key caps too.

pal1c.jpeg

Marco Rey y Sander

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Oct 31, 2021, 5:49:58 AM10/31/21
to PAL 6502 computer
Just assembled and performed the first tests. To match my software development the KIM Uno and the 6502 Microprocessor KIT (for which I am just trying to expand the monitor program):
IMG_3906.png

Ronny Ribeiro

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Apr 10, 2022, 9:06:37 PM4/10/22
to PAL 6502 computer
This post is my "hello world!" to the group :D
I wanted to show you the solution I adopted to get rid of the hot 7805 linear regulator. I've found this small 78xx pin-to-pin compatible dc-dc converter on aliexpress and it is very inexpensive. It can take 24V input and output 3A max. Worked like a charm!
By the way, I would like to thank everyone for all the information posted here. It helped me a lot!
Best Regards from Brazil,

Ronny
PAL-1_detail.jpgPAL-1_setup.jpg

GN L

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Apr 10, 2022, 9:45:01 PM4/10/22
to Ronny Ribeiro, PAL 6502 computer
Hi Ronny,

Thank you for sharing your photos and modification here!

It’s pleasure to see the PAL-1 on picture, and happy tinkering~

> On Apr 11, 2022, at 9:06 AM, Ronny Ribeiro <ronny...@gmail.com> wrote:
>
> This post is my "hello world!" to the group :D
> I wanted to show you the solution I adopted to get rid of the hot 7805 linear regulator. I've found this small 78xx pin-to-pin compatible dc-dc converter on aliexpress and it is very inexpensive. It can take 24V input and output 3A max. Worked like a charm!
> By the way, I would like to thank everyone for all the information posted here. It helped me a lot!
> Best Regards from Brazil,
>
> Ronny
> <PAL-1_detail.jpg><PAL-1_setup.jpg>
>

Best,
Liu

Magnus Olsson

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Apr 11, 2022, 11:59:22 AM4/11/22
to PAL 6502 computer
Ronny,

I see you've put heat sinks on the 6502 and 6532. Did they get hot, too? Mine don't get warmer than about 30 degrees or so during normal operation.

I will put a heat sink on the 7805, in preparation for when my expansion boards arrive.

Hans Otten

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Apr 11, 2022, 2:17:30 PM4/11/22
to PAL 6502 computer
 NMOS like 6502 and 6532 get warm, not hot. Cooling is not necessary, never done it at 1 MHz, but it the will not hurt. Cooling the 7805 is advisable when yiu add extensions. 

Magnus Olsson

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Apr 12, 2022, 3:57:28 AM4/12/22
to PAL 6502 computer
I have never seen an 8-bit computer that had a CPU cooler, that's why I asked. 

Below is a close-up of my board just after assembly. 

IMG_2211.JPG

Ronny Ribeiro

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Apr 12, 2022, 5:16:03 PM4/12/22
to PAL 6502 computer
Hi everyone!

They don't get hot, but they get pretty warm here in the tropics.
And here is what I think: these are vintage chips, they will not be around for much long. According to Arrhenius law, lifetime is shortened at higher temperatures (there are some chemical reactions and physical processes slowly going irreversibly forward inside every electronic component).
I just love these chips and computer so much that I decide to make things a little harder for entropy to take them away!
And the heatsinks brought some personality for my beloved PAL-1!

Cheers!

Jeremy Starcher

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Apr 16, 2022, 8:37:56 PM4/16/22
to PAL 6502 computer
Mine is mostly unmodified, but I've got it safely in a case case, well, I'm a clutz.

GN L

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Apr 16, 2022, 11:40:42 PM4/16/22
to Jeremy Starcher, PAL 6502 computer
Good looking case!!

I post a thumbnail of the pictures here for quick look~


On Apr 17, 2022, at 8:37 AM, Jeremy Starcher <jeremy....@gmail.com> wrote:

Mine is mostly unmodified, but I've got it safely in a case case, well, I'm a clutz.

https://postimg.cc/gallery/6q08zLR/a341631b

On Tuesday, April 12, 2022 at 5:16:03 PM UTC-4 ronny...@gmail.com wrote:
Hi everyone!

They don't get hot, but they get pretty warm here in the tropics. 
And here is what I think: these are vintage chips, they will not be around for much long. According to Arrhenius law, lifetime is shortened at higher temperatures (there are some chemical reactions and physical processes slowly going irreversibly forward inside every electronic component).
I just love these chips and computer so much that I decide to make things a little harder for entropy to take them away!
And the heatsinks brought some personality for my beloved PAL-1!

Cheers!
Em terça-feira, 12 de abril de 2022 às 04:57:28 UTC-3, mne...@gmail.comescreveu:
I have never seen an 8-bit computer that had a CPU cooler, that's why I asked. 

Below is a close-up of my board just after assembly. 





On Monday, April 11, 2022 at 8:17:30 PM UTC+2 hansj...@gmail.comwrote:
 NMOS like 6502 and 6532 get warm, not hot. Cooling is not necessary, never done it at 1 MHz, but it the will not hurt. Cooling the 7805 is advisable when yiu add extensions. 

On Monday, April 11, 2022 at 5:59:22 PM UTC+2 mne...@gmail.comwrote:
Ronny,

I see you've put heat sinks on the 6502 and 6532. Did they get hot, too? Mine don't get warmer than about 30 degrees or so during normal operation.

I will put a heat sink on the 7805, in preparation for when my expansion boards arrive.


On Monday, April 11, 2022 at 3:06:37 AM UTC+2 ronny...@gmail.comwrote:
This post is my "hello world!" to the group :D
I wanted to show you the solution I adopted to get rid of the hot 7805 linear regulator. I've found this small 78xx pin-to-pin compatible dc-dc converter on aliexpress and it is very inexpensive. It can take 24V input and output 3A max. Worked like a charm!
By the way, I would like to thank everyone for all the information posted here. It helped me a lot!
Best Regards from Brazil,

Ronny


Em domingo, 31 de outubro de 2021 às 06:49:58 UTC-3, mreyy...@gmail.com escreveu:
Just assembled and performed the first tests. To match my software development the KIM Uno and the 6502 Microprocessor KIT (for which I am just trying to expand the monitor program):


johntk...@gmail.com schrieb am Freitag, 22. Oktober 2021 um 20:08:35 UTC+2:
I used my PAL-1 to help test a 6502 emulator I wrote - details here: https://github.com/GrantMeStrength/KIM1

I made a case out of acrylic and 3D printed some key caps too.



On Monday, October 18, 2021 at 5:48:40 AM UTC-7 master...@googlemail.com wrote:


My current setup. Everything mounted on a Plexiglas, the PAL-1 itself is covered with plexi.
Above the Motherboard you see the raspbery zero running piGFX, on the bottom of the motherboard you see the dTR Tape emulator.
(sadly this does not work  in combination with the tape interface).


Nils

liuga...@gmail.com schrieb am Montag, 18. Oktober 2021 um 14:30:14 UTC+2:

Today’s setup😊

On Sun, Oct 17, 2021 at 20:25 Hendrik-Jan Megens <hjme...@gmail.com> wrote:
The obligatory thread for showing off your completed kits and setup for the PAL-1. Also a great place to share building stories or ideas to inspire others. 

I'll kick off with mine:

Inspired by an original KIM-1 that was attached to a piece of cheap plywood that is on display at the Homecomputer museum in The Netherlands, I decided to attach my PAL-1 to a piece of leftover floorboard - advantage: it doesn't warp! 


Below is a picture of my PAL-1 ROM card connected to the ROM emulator designed by Kris Sekula (Mygeekyhobby.com). 


Cheers,
Hendrik-Jan

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Best Regards,
Liu GN

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Best,
Liu

Jeremy Starcher

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Apr 17, 2022, 1:01:33 AM4/17/22
to PAL 6502 computer
Shoutout to the case's maker and page on Thingiverse.

Michael Doornbos

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Apr 17, 2022, 7:02:51 AM4/17/22
to Jeremy Starcher, GN L, PAL 6502 computer
Great case!


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Michael Doornbos
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828-450-7418
HAM: N4LNX 
On Apr 16, 2022, 23:40 -0400, GN L <liuga...@gmail.com>, wrote:
Good looking case!!

I post a thumbnail of the pictures here for quick look~
<Screen Shot 2022-04-17 at 11.37.49 AM.png>

Neil Andretti

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Apr 17, 2022, 7:13:45 AM4/17/22
to PAL 6502 computer
Good job! I just used the 3D printed Keycaps of the file.
Btw: John also created some printable keycaps: https://www.thingiverse.com/thing:4885469

The dTR housing is very cool. Tuesday at work, I have access to the 3D printer \o/
Thank you Jeremy

Nils

Hans Van Slooten

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Aug 5, 2022, 11:20:55 PM8/5/22
to PAL 6502 computer
Liu asked me to post my setup in here. I took a cue from masterhit1 with the PigFX RPi Zero terminal to make a self-contained computer. Ordered a male RS232-TTL adapter that will eliminate the need for a gender changer as well. 

Using a wireless USB keyboard and a small LCD connected to the RPi for the terminal. Green acrylic for the base with rubber feet for stability.

IMG_6240.jpg
IMG_6241.jpg
IMG_6242.jpg
IMG_6243.jpg

Related, I printed the "First Book of KIM" at the local Fedex with a plastic cover and black vinyl back. It was more expensive than I would've liked, but it was much cheaper than a used copy.
IMG_6234.jpgIMG_6235.jpgIMG_6236.jpg

Hans V.

D Hassler

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Aug 10, 2022, 4:53:28 PM8/10/22
to PAL 6502 computer
Hiya, group.  Here's my current setup: the PAL-1 and a homemade 32K RAM board made from (mostly) stuff I had laying around.  It was my first build-it-just-from-the-schematic project, so the fact that it works at all is a minor miracle -- and it wouldn't have worked at all without the help I received here in this group.  PS: no, you do not get to see the backside of the RAM board  :^)  And the white stuff on the header connector to my improvised backplane is tub-n-tile sealer ... flexible but strong, and sticky as all get-out when wet!
PAL-1_32K.JPG

Marco

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Oct 4, 2022, 9:26:00 AM10/4/22
to PAL 6502 computer
Hi all,

I have been slowly building and adding stuff over the past couple of weeks, and it's now finished enough to show, I guess. All in all great fun so far!

MDX-221004-S10-OC24906-x.jpg

Most obvious is the 3D printed base, it's a two-part job (white and black) with countersunk m3 nuts. If anyone is interested I could add it to Thingiverse.

I replicated the 7805 with a more efficient R-78B5 switching regulator. Yes they are more expensive, but stay cool. The somewhat more noisy 5V signal is no problem for the PAL-1.

The power LED resistor is changed to 330 Ohm, to dim it a bit. I will probably swap it out for an even higher resistance.

The RS232 to UART adapter has the Rx and Tx pins swapped. It's connected to an UART to USB board mounted on a prototype board. The idea is to eventually change over to Esp-link on a NodeMCU board for WiFi terminal access, but I haven't got that working yet...

I copied the extended ROM to an 27C256, of which I have a few lying around. Not that these are better but just because I could ;-)

MDX-221004-S10-OC24907-x.jpg

MDX-221004-S10-OC24908-x.jpg

Cheers,
Marco
Op woensdag 10 augustus 2022 om 22:53:28 UTC+2 schreef blueja...@gmail.com:

Marco

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Oct 7, 2022, 7:14:44 AM10/7/22
to PAL 6502 computer
In the mean time I got ESP-link on a NodeMCU board working, so now my PAL-1 terminal is WiFi connected :-)

MDX-221007-S10-OC24911-x.jpg

MDX-221007-S10-OC24910-x.jpg

ESP-link's build-in web terminal isn't much good, only for testing if the connection with the PAL-1 actually works. ESP-link however also offers the terminal on port 23 (telnet). On my Linux workstation, in a script, I first create a virtual COM port with socat ( socat pty,rawer,b4800,link=/tmp/ttyPAL1,waitslave tcp4:<ip address of ESP-link>:23,ignoreeof,forever,keepalive,reuseaddr & ) and then use picocom to connect to it ( picocom -b 4800 -i --send-cmd "ascii-xfr -s -l 100 -c 100" /dev/ttyPAL1 ). The same script also kills socat again when picocom is closed ( pkill socat ). This works like a charm. Baud rate and transfer delays may be a bit conservative, but it works.

Cheers,
Marco


Op dinsdag 4 oktober 2022 om 15:26:00 UTC+2 schreef Marco:

GN L

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Oct 7, 2022, 8:41:38 AM10/7/22
to Marco, PAL 6502 computer
Thanks for sharing a new approach in photos!

> On Oct 7, 2022, at 7:14 PM, Marco <crou...@gmail.com> wrote:
>
> In the mean time I got ESP-link on a NodeMCU board working, so now my PAL-1 terminal is WiFi connected :-)
>
> <MDX-221007-S10-OC24911-x.jpg>
>
> <MDX-221007-S10-OC24910-x.jpg>
>
> ESP-link's build-in web terminal isn't much good, only for testing if the connection with the PAL-1 actually works. ESP-link however also offers the terminal on port 23 (telnet). On my Linux workstation, in a script, I first create a virtual COM port with socat ( socat pty,rawer,b4800,link=/tmp/ttyPAL1,waitslave tcp4:<ip address of ESP-link>:23,ignoreeof,forever,keepalive,reuseaddr & ) and then use picocom to connect to it ( picocom -b 4800 -i --send-cmd "ascii-xfr -s -l 100 -c 100" /dev/ttyPAL1 ). The same script also kills socat again when picocom is closed ( pkill socat ). This works like a charm. Baud rate and transfer delays may be a bit conservative, but it works.
>
> Cheers,
> Marco
>
>
> Op dinsdag 4 oktober 2022 om 15:26:00 UTC+2 schreef Marco:
> Hi all,
>
> I have been slowly building and adding stuff over the past couple of weeks, and it's now finished enough to show, I guess. All in all great fun so far!
>
>
>
> --
> You received this message because you are subscribed to the Google Groups "PAL 6502 computer" group.
> To unsubscribe from this group and stop receiving emails from it, send an email to pal6502+u...@googlegroups.com.
> To view this discussion on the web visit https://groups.google.com/d/msgid/pal6502/85b61647-745c-4ba8-85b2-2ff2c6ab980bn%40googlegroups.com.
> For more options, visit https://groups.google.com/d/optout.
> <MDX-221007-S10-OC24911-x.jpg><MDX-221007-S10-OC24910-x.jpg>

Best,
Liu

Marco

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Oct 10, 2022, 2:08:39 AM10/10/22
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I cheered too soon, the ESP-link WiFi terminal isn't flawless (yet). I haven´t tested everything, but here's what I found:
  • The default monitor works fine, there is no difference between ESP-link and an FTDI cable connection.
  • Microsoft Basic on expanded ROM bank 0 works equally well.
  • Switching to bank 1, it immediately becomes very unresponsive. I can for instance go to address B400 and try to start PBUG ('G'), but it only responds after a couple of enter keys, with error messages, and is generally unworkable. There is some feedback, but only partially (the help menu stops halfway, for instance) or none at all. I have no problems when FTDI cable or UART to USB board connected, so the ROM is fine.
I suspect it is a limitation of ESP-link on the NodeMCU board, since all of the other factors (PAL-1, socat, picocom, etc) work fine with FTDI. I was trying a lot of different settings yesterday to get it working, but without success. I have been using ESP-link on other projects (RC2014 for instance), but of course one success story is no guarantee. And that makes this hobby fun ;-)



Op vrijdag 7 oktober 2022 om 13:14:44 UTC+2 schreef Marco:
In the mean time I got ESP-link on a NodeMCU board working, so now my PAL-1 terminal is WiFi connected :-)

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